Invention Grant
- Patent Title: High lift warning system
- Patent Title (中): 高升程警告系统
-
Application No.: US802247Application Date: 1991-12-04
-
Publication No.: US5207297APublication Date: 1993-05-04
- Inventor: John M. Beattie , Jimmie D. Sinden
- Applicant: John M. Beattie , Jimmie D. Sinden
- Applicant Address: CO Greeley
- Assignee: TRLI, Inc.
- Current Assignee: TRLI, Inc.
- Current Assignee Address: CO Greeley
- Main IPC: B66F7/04
- IPC: B66F7/04
Abstract:
A warning system for use in lifting apparatus to signal when an object has been lifted to a predetermined elevation. A source of electromagnetic energy and a photodetector cooperate to create a beam which extends over the object being lifted. When the object obstructs the beam, an alarm is activated.
Public/Granted literature
- US5893451A Catenary belt support mechanism Public/Granted day:1999-04-13
Information query
IPC分类:
